CA2565916A1 - Flat-ended bag having an optimised splitting behaviour, and method for the production thereof - Google Patents
Flat-ended bag having an optimised splitting behaviour, and method for the production thereof Download PDFInfo
- Publication number
- CA2565916A1 CA2565916A1 CA002565916A CA2565916A CA2565916A1 CA 2565916 A1 CA2565916 A1 CA 2565916A1 CA 002565916 A CA002565916 A CA 002565916A CA 2565916 A CA2565916 A CA 2565916A CA 2565916 A1 CA2565916 A1 CA 2565916A1
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- Prior art keywords
- stand
- pouch
- stretched film
- unidirectionally stretched
- pouch according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
- B65D75/52—Details
- B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
- B65D75/5805—Opening or contents-removing devices added or incorporated during package manufacture for tearing a side strip parallel and next to the edge, e.g. by means of a line of weakness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
- B65D75/008—Standing pouches, i.e. "Standbeutel"
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bag Frames (AREA)
- Wrappers (AREA)
- Making Paper Articles (AREA)
- Packages (AREA)
Abstract
The invention relates to a flat-ended bag comprising a body and a bottom, especially a flat bottom, at least the body of said bag comprising at least one unidirectionally stretched film. The invention also relates to a method for producing one such flat-ended bag.
Description
"Stand-up pouch having optimised tear-open behaviour, and method for the production thereof' Description The invention relates to a stand-up pouch and to a method for the production thereof, in accordance with the preambles of patent claims 1 and 13.
Stand-up pouches of the kind mentioned are widely used as substitutes for bags, as well as bottles, tins and cartons, for the packaging of solid, liquid and paste-like foods and consumables and also for utility products of all kinds.
Stand-up pouches have numerous advantages over the above-mentioned conventional packagings: there may be mentioned, firstly, their low weight, their excellent storability accompanied by simplicity and economy of manufacture as well as their unproblematic disposal.
However, when using stand-up pouches, their frequently poor opening behaviour has been found to be disadvantageous, the stand-up pouch often being uncontrollably torn open once an initial tear has been made in the stand-up pouch, for example with the aid of a notch, resulting in destruction of the stand-up pouch and in spillage of the contents of the pouch. Further use of the opened stand-up pouch is completely impossible.
Numerous aids such as, for example, tear-open threads, perforations or the utilisation of scissors or knives have been used or recommended as a solution to that problem;
however, these in turn have required laborious and expensive manufacturing and production methods or necessitated additional implements that are not always to hand.
In that regard there is a great need for a stand-up pouch which can be opened by simple means without being completely destroyed and without the whole stand-up pouch being torn open uncontrollably, and which is available for further use even after opening.
The problem of the invention is accordingly to make available a simpie stand-up pouch which is economical to manufacture, having the afore-mentioned properties whilst avoiding the disadvantages of the prior art, and which in addition to its suitability for a wide variety of uses is made from a material that has a long service life and that can be disposed of without problems.
The problem is solved by a stand-up pouch according to patent claim 1 and by a method for the production thereof according to patent claim 13. In particular, the problem is solved by a stand-up pouch having a stand-up pouch body and a stand-up pouch base, especially a standing base, wherein at least the stand-up pouch body comprises at least one unidirectionally stretched film.
In this context it should be mentioned that within the framework of the invention a stand-up pouch is to be understood as any container formed from a film and/or laminate, especially including tubular pouches, with or without a separate or connected base part and/or shoulder part and/or lid part.
A fundamental aspect of the invention is that in a unidirectionally stretched film the molecule chains forming the film are oriented and are arranged substantially parallel in the stretching direction. As a result thereof, the stretched material preferentially splits parallel to the stretching direction as opposed to in a direction at an angle thereto, so that tearing into the material at an angle is made very difficult or impossible by the oriented molecule chains.
A further advantage in the use of a unidirectionally stretched film is that, when such a film is split or torn open parallel to the stretching direction, none of the moiecule chains have to be severed or torn out from an association of molecules because the molecule chains forming the material are not convoluted but are arranged more or less straight, beside one another. As a result, tearing such a unidirectionally stretched film parallel to the stretching direction requires a greatly reduced tearing force compared to conventional films which is up to 50 % to 60 % below the tearing force that would be necessary for a conventionally non-stretched or bidirectionally stretched film.
In that respect, a stand-up pouch made from a unidirectionally stretched film, at least in a tear-open region, exhibits optimised tear-open behaviour compared to conventional stand-up pouches, with a straight and even tear edge which follows the stretching direction. In the case of such a stand-up pouch there is no need to fear that a tear will uncontrollably extend through the whole body of the stand-up pouch, so that even stand-up pouches with liquid contents can be torn open without problems and without having to fear any loss of the contents of the pouch.
In accordance with the invention, as mentioned hereinbefore, at least that part of the stand-up pouch body which is to be torn open is formed from at least one unidirectionaily stretched film. For the sake of completeness, however, it should be mentioned that the entire stand-up pouch body and also the stand-up pouch stand-up base or standing base and the stand-up pouch lid and/or a shoulder part connected to the latter may also be made from such a unidirectionally stretched film.
In accordance with one embodiment, the unidirectionally stretched film is part of a laminate, which may comprise a barrier layer. In accordance with the invention, the unidirectional film comprises at least one polyolefin and/or ester, preferred materials being polyethylene and/or polypropylene and/or polyethylene terephthalate. The optional barrier layer can be made, for example, of ethyl vinyl alcohol (EVOH) or a metal vapour-deposited onto the laminate or used in the form of a foil. A further barrier layer material comprises, for example, glass-like substances, which may comprise Si02. The afore-mentioned materials may, in the case of polyethylene and/or polypropylene, be present in pure form but also as a co-extrudate and also in conjunction with polyethylene terephthalate.
As metal there comes into consideration, especially, aluminium, although depending on the application other, preferably corrosion-resistant, metals may also be used.
In accordance with the invention, the barrier layer is arranged on at least one sealable layer and is preferably embedded, for example between polyethylene terephthalate and polypropylene or polyethylene. Of course, a multilayer laminate having a plurality of barrier layers may also be provided, in which case preferably at least one of the outermost layers, especially the outermost layer, is sealable.
In accordance with the invention, the unidirectionally stretched film - there may also be plurality of unidirectionally stretched films - has a greater thickness relative to further layers of the laminate.
Stand-up pouches of the kind mentioned are widely used as substitutes for bags, as well as bottles, tins and cartons, for the packaging of solid, liquid and paste-like foods and consumables and also for utility products of all kinds.
Stand-up pouches have numerous advantages over the above-mentioned conventional packagings: there may be mentioned, firstly, their low weight, their excellent storability accompanied by simplicity and economy of manufacture as well as their unproblematic disposal.
However, when using stand-up pouches, their frequently poor opening behaviour has been found to be disadvantageous, the stand-up pouch often being uncontrollably torn open once an initial tear has been made in the stand-up pouch, for example with the aid of a notch, resulting in destruction of the stand-up pouch and in spillage of the contents of the pouch. Further use of the opened stand-up pouch is completely impossible.
Numerous aids such as, for example, tear-open threads, perforations or the utilisation of scissors or knives have been used or recommended as a solution to that problem;
however, these in turn have required laborious and expensive manufacturing and production methods or necessitated additional implements that are not always to hand.
In that regard there is a great need for a stand-up pouch which can be opened by simple means without being completely destroyed and without the whole stand-up pouch being torn open uncontrollably, and which is available for further use even after opening.
The problem of the invention is accordingly to make available a simpie stand-up pouch which is economical to manufacture, having the afore-mentioned properties whilst avoiding the disadvantages of the prior art, and which in addition to its suitability for a wide variety of uses is made from a material that has a long service life and that can be disposed of without problems.
The problem is solved by a stand-up pouch according to patent claim 1 and by a method for the production thereof according to patent claim 13. In particular, the problem is solved by a stand-up pouch having a stand-up pouch body and a stand-up pouch base, especially a standing base, wherein at least the stand-up pouch body comprises at least one unidirectionally stretched film.
In this context it should be mentioned that within the framework of the invention a stand-up pouch is to be understood as any container formed from a film and/or laminate, especially including tubular pouches, with or without a separate or connected base part and/or shoulder part and/or lid part.
A fundamental aspect of the invention is that in a unidirectionally stretched film the molecule chains forming the film are oriented and are arranged substantially parallel in the stretching direction. As a result thereof, the stretched material preferentially splits parallel to the stretching direction as opposed to in a direction at an angle thereto, so that tearing into the material at an angle is made very difficult or impossible by the oriented molecule chains.
A further advantage in the use of a unidirectionally stretched film is that, when such a film is split or torn open parallel to the stretching direction, none of the moiecule chains have to be severed or torn out from an association of molecules because the molecule chains forming the material are not convoluted but are arranged more or less straight, beside one another. As a result, tearing such a unidirectionally stretched film parallel to the stretching direction requires a greatly reduced tearing force compared to conventional films which is up to 50 % to 60 % below the tearing force that would be necessary for a conventionally non-stretched or bidirectionally stretched film.
In that respect, a stand-up pouch made from a unidirectionally stretched film, at least in a tear-open region, exhibits optimised tear-open behaviour compared to conventional stand-up pouches, with a straight and even tear edge which follows the stretching direction. In the case of such a stand-up pouch there is no need to fear that a tear will uncontrollably extend through the whole body of the stand-up pouch, so that even stand-up pouches with liquid contents can be torn open without problems and without having to fear any loss of the contents of the pouch.
In accordance with the invention, as mentioned hereinbefore, at least that part of the stand-up pouch body which is to be torn open is formed from at least one unidirectionaily stretched film. For the sake of completeness, however, it should be mentioned that the entire stand-up pouch body and also the stand-up pouch stand-up base or standing base and the stand-up pouch lid and/or a shoulder part connected to the latter may also be made from such a unidirectionally stretched film.
In accordance with one embodiment, the unidirectionally stretched film is part of a laminate, which may comprise a barrier layer. In accordance with the invention, the unidirectional film comprises at least one polyolefin and/or ester, preferred materials being polyethylene and/or polypropylene and/or polyethylene terephthalate. The optional barrier layer can be made, for example, of ethyl vinyl alcohol (EVOH) or a metal vapour-deposited onto the laminate or used in the form of a foil. A further barrier layer material comprises, for example, glass-like substances, which may comprise Si02. The afore-mentioned materials may, in the case of polyethylene and/or polypropylene, be present in pure form but also as a co-extrudate and also in conjunction with polyethylene terephthalate.
As metal there comes into consideration, especially, aluminium, although depending on the application other, preferably corrosion-resistant, metals may also be used.
In accordance with the invention, the barrier layer is arranged on at least one sealable layer and is preferably embedded, for example between polyethylene terephthalate and polypropylene or polyethylene. Of course, a multilayer laminate having a plurality of barrier layers may also be provided, in which case preferably at least one of the outermost layers, especially the outermost layer, is sealable.
In accordance with the invention, the unidirectionally stretched film - there may also be plurality of unidirectionally stretched films - has a greater thickness relative to further layers of the laminate.
It is, moreover, within the framework of the invention for the thicfcness of the unidirectionally stretched film to be greater than that of the remaining further layers of the laminate, the thickness of a unidirectionally stretched film being in the range ffom pm to 200 pm, preferably in the range from 35 pm to 155 pm and especially in the range from 45 pm to 95 pm.
By that means it is ensured that the tear-open behaviour of the stand-up pouch is clearly and decisively defined by the one or more unidirectionally stretched filrrr(s).
It should be mentioned at this point that, for production of the stand-up pouch according to the invention, granulates can also be used which have very good tearing behaviour and a high melt flow index and a molecule structure oriented in accordance with the tear-open direction.
In accordance with a preferred embodiment, the stand-up pouch produced using the unidirectionally stretched film is sterilisable. In that case, polypropylene, preferably, is provided as film material, whereas for stand-up pouches which do not need to be sterilisable polyethylene is a preferred, economical and suitable material.
In accordance with one embodiment, the stand-up pouch body is extruded in tubular form or produced in lap-sealed or fin-sealed form, which contributes to an optimised round shape of the stand-up or tubular pouch body.
The stability of the stand-up pouch is decisively ensured by at least one unidirectionally stretched film, the use of polyethylene terephthalate decisively contributing to the mechanical stability and the use of polypropyiene and/or polyethylene decisively contributing to the dimensional stability.
In accordance with an especially preferred embodiment of the invention there is provided on the stand-up pouch body, for example at a sealing seam, an initial tearing aid, especially a notch or like direction-defining weakening, by means of which further tearing-open of the stand-up pouch parallel to a unidirectional stretching direction of the unidirectionally stretched film can be initiated.
By that means it is ensured that the tear-open behaviour of the stand-up pouch is clearly and decisively defined by the one or more unidirectionally stretched filrrr(s).
It should be mentioned at this point that, for production of the stand-up pouch according to the invention, granulates can also be used which have very good tearing behaviour and a high melt flow index and a molecule structure oriented in accordance with the tear-open direction.
In accordance with a preferred embodiment, the stand-up pouch produced using the unidirectionally stretched film is sterilisable. In that case, polypropylene, preferably, is provided as film material, whereas for stand-up pouches which do not need to be sterilisable polyethylene is a preferred, economical and suitable material.
In accordance with one embodiment, the stand-up pouch body is extruded in tubular form or produced in lap-sealed or fin-sealed form, which contributes to an optimised round shape of the stand-up or tubular pouch body.
The stability of the stand-up pouch is decisively ensured by at least one unidirectionally stretched film, the use of polyethylene terephthalate decisively contributing to the mechanical stability and the use of polypropyiene and/or polyethylene decisively contributing to the dimensional stability.
In accordance with an especially preferred embodiment of the invention there is provided on the stand-up pouch body, for example at a sealing seam, an initial tearing aid, especially a notch or like direction-defining weakening, by means of which further tearing-open of the stand-up pouch parallel to a unidirectional stretching direction of the unidirectionally stretched film can be initiated.
By means of an initial tearing or tear-open aid of a such a kind, appropriate initial tearing of the tubular pouch is ensured, the tearing pointer or notch which points in the direction of the stand-up pouch opening out into the opening seam to-be or leading to the opening split in the unidirectionally stretched film.
In principle it should be mentioned, however, that an initial tearing aid of such a kind is not imperative because the tearing force required to open the stand-up pouch is substantially reduced compared to conventional stand-up pouches and, for example, even a notch made by a finger-nail or some other article provided with an .edge will, depending on the thickness of the film or laminate, allow the stand-up pouch to be torn open properly and cleanly with a clearly defined straight tear-line.
Accordingly, measures according to the prior art for facilitated tearing-open of a stand-up pouch such as the complicated incorporation of tear-open threads or tapes, or perforations (in that case having in mind punched holes or laser perforations with the accompanying disadvantages), in or on the laminate or film are no longer necessary.
Accordingly, in the production of the stand-up pouch according to the invention, a considerable reduction in production and material costs is possible because conventional and extremely economical materials such as polyolefins and/or polyamides, for example polypropylene, polyethylene or polyethylene tsrephthalate, are entirely sufficient in order to produce a stretched film in accordance with the invention and, from that, a corresponding stand-up pouch with or without barrier layers.
The problem according to the invention is furthermore solved by a method for the production of a stand-up pouch, which method is characterised by the following steps:
a) production of a thick film;
b) stretching of the thick film in a unidirectional direction;
c) lamination of the unidirectionally stretched film;
d) formation of the stand-up pouch;
e) optional incorporation of a direction-defining weakening, especially an initial tearing aid, in the stand-up pouch, whereby initial tearing of the stand-up pouch parallel to a unidirectional stretching direction of the unidirectionally stretched film is made possible.
In principle it should be mentioned, however, that an initial tearing aid of such a kind is not imperative because the tearing force required to open the stand-up pouch is substantially reduced compared to conventional stand-up pouches and, for example, even a notch made by a finger-nail or some other article provided with an .edge will, depending on the thickness of the film or laminate, allow the stand-up pouch to be torn open properly and cleanly with a clearly defined straight tear-line.
Accordingly, measures according to the prior art for facilitated tearing-open of a stand-up pouch such as the complicated incorporation of tear-open threads or tapes, or perforations (in that case having in mind punched holes or laser perforations with the accompanying disadvantages), in or on the laminate or film are no longer necessary.
Accordingly, in the production of the stand-up pouch according to the invention, a considerable reduction in production and material costs is possible because conventional and extremely economical materials such as polyolefins and/or polyamides, for example polypropylene, polyethylene or polyethylene tsrephthalate, are entirely sufficient in order to produce a stretched film in accordance with the invention and, from that, a corresponding stand-up pouch with or without barrier layers.
The problem according to the invention is furthermore solved by a method for the production of a stand-up pouch, which method is characterised by the following steps:
a) production of a thick film;
b) stretching of the thick film in a unidirectional direction;
c) lamination of the unidirectionally stretched film;
d) formation of the stand-up pouch;
e) optional incorporation of a direction-defining weakening, especially an initial tearing aid, in the stand-up pouch, whereby initial tearing of the stand-up pouch parallel to a unidirectional stretching direction of the unidirectionally stretched film is made possible.
For production of the thick film, a polyolefin and/or polyamide such as, for example, polyethylene or polypropylene or a co-extrudate thereof is used. It is likewise possible to use polyethylene terephthalate for production of the thick film.
In accordance with an embodying variant, it is possible to carry out steps a) to c) simultaneously or quasi-simultaneously, especially in the course of a coextrusion procedure. In this case it is possible, directly during production of the laminate, to introduce a barrier layer on or between layers of the laminate.
It is likewise possible for the laminate to be produced, and especially extruded and, where appropriate, sealed, as a film in sheet form or as a fin-sealed or lap-sealed tube.
Further embodiments of the invention are to be found in the subordinate claims.
The invention will be described hereinbelow with reference to two exemplifying embodiments.
A stand-up pouch according to the invention is produced by first producing a thick film from each of polypropylene and polyethylene terephthalate. The polyethylene terephthalate thick film and the polypropylene thick film are unidirectionally stretched in the machine direction. Then, an aluminium layer having a layer thickness of 8 pm is applied to the stretched polypropylene film, which has a layer thickness of 70 pm. The afore-mentioned stretched polyethylene terephthalate layer, which has a thickness of 12 pm, is in turn laminated onto the aluminium layer.
The thereby produced laminate having a barrier property is formed into a tube by means of a lap-seal join so as to form a tubular pouch body, in the bottom of which a base part having a barrier property, for example a deep-drawn base part, is sealed. At the top, the tubular pouch is sealed by means of a fin seal. As a tearing-open aid, a notch is so arranged at a lower boundary of the fin seal that, on tearing open the tubular pouch, the top fin seal is removed and the tubular pouch opened. As a result of removing the top fin seal, which held together the top of the tubular pouch in the closed state, the tubular pouch can then regain its round tubular pouch body shape so that the level of the contents of the pouch then drops down a little as a result of the pouch becoming wider, and spillage of the contents of the pouch is additionally avoided as a result.
In accordance with an embodying variant, it is possible to carry out steps a) to c) simultaneously or quasi-simultaneously, especially in the course of a coextrusion procedure. In this case it is possible, directly during production of the laminate, to introduce a barrier layer on or between layers of the laminate.
It is likewise possible for the laminate to be produced, and especially extruded and, where appropriate, sealed, as a film in sheet form or as a fin-sealed or lap-sealed tube.
Further embodiments of the invention are to be found in the subordinate claims.
The invention will be described hereinbelow with reference to two exemplifying embodiments.
A stand-up pouch according to the invention is produced by first producing a thick film from each of polypropylene and polyethylene terephthalate. The polyethylene terephthalate thick film and the polypropylene thick film are unidirectionally stretched in the machine direction. Then, an aluminium layer having a layer thickness of 8 pm is applied to the stretched polypropylene film, which has a layer thickness of 70 pm. The afore-mentioned stretched polyethylene terephthalate layer, which has a thickness of 12 pm, is in turn laminated onto the aluminium layer.
The thereby produced laminate having a barrier property is formed into a tube by means of a lap-seal join so as to form a tubular pouch body, in the bottom of which a base part having a barrier property, for example a deep-drawn base part, is sealed. At the top, the tubular pouch is sealed by means of a fin seal. As a tearing-open aid, a notch is so arranged at a lower boundary of the fin seal that, on tearing open the tubular pouch, the top fin seal is removed and the tubular pouch opened. As a result of removing the top fin seal, which held together the top of the tubular pouch in the closed state, the tubular pouch can then regain its round tubular pouch body shape so that the level of the contents of the pouch then drops down a little as a result of the pouch becoming wider, and spillage of the contents of the pouch is additionally avoided as a result.
In accordance with a second exemplifying embodiment, a thick film is first produced from polypropylene, which is subsequently unidirectionally stretched in the running direction of the machine until a layer thickness of stretched polypropylene film of 70 pm is achieved.
A further thick film of polyethylene terephthalate is also unidirectionally stretched in the machine direction until a layer thickness of stretched polyethylene terephthalate film of about 12 pm is achieved. From those two stretched films, together with an aluminium foil having a layer thickness of 8 pm arranged between them, there is produced a laminate in sheet form.
From that laminate, cut-outs of film for respective front and back sides of a stand-up pouch body are cut. The respective outside edges of the front and back sides of the laminate are sealed together over a width of about 3 mm. The base of the stand-up pouch is produced by sealing in place a cut-out having a V-shaped fold.
After filling, the top of the stand-up pouch is closed, for example by means of a fin seal.
Furthermore, at the side of the fin seal there is incorporated an initial tearing aid in the form of a notch, by means of which further tearing-open of the stand-up pouch can be initiated.
The initial tearing aid can be provided on one side, or on both sides, of the stand-up pouch.
When the stand-up pouch is then to be opened, lateral tearing-open of the stand-up pouch is initiated at the notch, directionally defined tearing-open parallel to the stand-up base being ensured by means of the unidirectionally stretched films, that tearing-open requiring a substantially reduced further tearing force compared to the tearing-open of a conventional stand-up pouch.
If desired, an impression can be provided adjacent to the tear-open line predefined by the tear-open notch and the stretching direction.
At this point it should be stated that all above-described parts, considered on their own and in any combination, are claimed as being important for the invention. The skilled person will be familiar with modifications thereof.
A further thick film of polyethylene terephthalate is also unidirectionally stretched in the machine direction until a layer thickness of stretched polyethylene terephthalate film of about 12 pm is achieved. From those two stretched films, together with an aluminium foil having a layer thickness of 8 pm arranged between them, there is produced a laminate in sheet form.
From that laminate, cut-outs of film for respective front and back sides of a stand-up pouch body are cut. The respective outside edges of the front and back sides of the laminate are sealed together over a width of about 3 mm. The base of the stand-up pouch is produced by sealing in place a cut-out having a V-shaped fold.
After filling, the top of the stand-up pouch is closed, for example by means of a fin seal.
Furthermore, at the side of the fin seal there is incorporated an initial tearing aid in the form of a notch, by means of which further tearing-open of the stand-up pouch can be initiated.
The initial tearing aid can be provided on one side, or on both sides, of the stand-up pouch.
When the stand-up pouch is then to be opened, lateral tearing-open of the stand-up pouch is initiated at the notch, directionally defined tearing-open parallel to the stand-up base being ensured by means of the unidirectionally stretched films, that tearing-open requiring a substantially reduced further tearing force compared to the tearing-open of a conventional stand-up pouch.
If desired, an impression can be provided adjacent to the tear-open line predefined by the tear-open notch and the stretching direction.
At this point it should be stated that all above-described parts, considered on their own and in any combination, are claimed as being important for the invention. The skilled person will be familiar with modifications thereof.
Claims (14)
1. Stand-up pouch having a stand-up pouch body and a stand-up pouch base, especially a standing base, characterised in that at least the stand-up pouch body comprises at least one unidirectionally stretched film.
2. Stand-up pouch according to claim 1, characterised in that the unidirectionally stretched film is part of a laminate.
3. Stand-up pouch according to claim 2, characterised in that the unidirectionally stretched film has a greater thickness relative to further layers of the laminate.
4. Stand-up pouch according to claim 2 or 3, characterised in that the thickness of the unidirectionally stretched film is greater than that of the remaining further layers of the laminate.
5. Stand-up pouch according to one of the preceding claims, characterised in that the at least one unidirectionally stretched film comprises at least one polyolefin and/or polyamide and/or ester, especially polyethylene and/or polypropylene and/or polyethylene terephthalate.
6. Stand-up pouch according to one of the preceding claims, characterised in that a stability of the stand-up pouch is decisively ensured by means of at least one unidirectionally stretched film.
7. Stand-up pouch according to one of the preceding claims, characterised in that the unidirectionally stretched film has a thickness in the range from 10 µm to 200 µm, preferably in the range from 35 µm to 155 µm and especially in the range from 45 µm to 95 µm.
8. Stand-up pouch according to one of claims 2 to 7, characterised in that the laminate comprises at least one barrier layer.
9. Stand-up pouch according to one of claims 2 to 7, characterised in that the barrier layer comprises ethyl vinyl alcohol (EVOH) and/or SiO2 and/or metal, especially aluminium.
10. Stand-up pouch according to one of the preceding claims, characterised in that the stand-up pouch is sterilisable.
11. Stand-up pouch according to one of the preceding claims, characterised in that the stand-up pouch body is extruded in tubular form or produced by means of a lap-seal and/or fin-seal.
12. Stand-up pouch according to one of the preceding claims, characterised in that there is provided on the stand-up pouch an initial tearing aid, especially a notch or like direction-defining weakening, by means of which further tearing-open of the stand-up pouch parallel to a unidirectional stretching direction of the unidirectionally stretched film can be initiated.
13. Method for the production of a stand-up pouch according to one of claims 1 to 12, characterised by the following steps:
a) production of a thick film;
b) stretching of the thick film in a unidirectional direction;
c) lamination of the unidirectionally stretched film;
d) formation of the stand-up pouch;
e) incorporation of a direction-defining weakening, especially an initial tearing aid, in the stand-up pouch, whereby initial tearing of the stand-up pouch parallel to a unidirectional stretching direction of the unidirectionally stretched film is made possible.
a) production of a thick film;
b) stretching of the thick film in a unidirectional direction;
c) lamination of the unidirectionally stretched film;
d) formation of the stand-up pouch;
e) incorporation of a direction-defining weakening, especially an initial tearing aid, in the stand-up pouch, whereby initial tearing of the stand-up pouch parallel to a unidirectional stretching direction of the unidirectionally stretched film is made possible.
14. Method according to claim 13, characterised in that steps a) to c) are carried out simultaneously or quasi-simultaneously, especially in the course of a coextrusion procedure.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004024348 | 2004-05-17 | ||
DE102004024348.4 | 2004-05-17 | ||
DE102004026980A DE102004026980B4 (en) | 2004-05-17 | 2004-06-03 | Stand-up pouches with optimized tear properties and process for its production |
DE102004026980.7 | 2004-06-03 | ||
PCT/EP2005/005290 WO2005113370A1 (en) | 2004-05-17 | 2005-05-13 | Flat-ended bag having an optimised splitting behaviour, and method for the production thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2565916A1 true CA2565916A1 (en) | 2005-12-01 |
Family
ID=34424598
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002565916A Abandoned CA2565916A1 (en) | 2004-05-17 | 2005-05-13 | Flat-ended bag having an optimised splitting behaviour, and method for the production thereof |
Country Status (11)
Country | Link |
---|---|
US (2) | US20080101733A1 (en) |
EP (1) | EP1751025A1 (en) |
JP (1) | JP2007537938A (en) |
CN (1) | CN101891034A (en) |
BR (1) | BRPI0511155A (en) |
CA (1) | CA2565916A1 (en) |
DE (3) | DE202004016420U1 (en) |
MX (1) | MXPA06013265A (en) |
NZ (1) | NZ551038A (en) |
RU (1) | RU2376227C2 (en) |
WO (1) | WO2005113370A1 (en) |
Families Citing this family (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202004016420U1 (en) | 2004-05-17 | 2005-03-24 | Huhtamaki Ronsberg, Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg | Stand-up pouch with optimized tear properties |
DE102005039852A1 (en) * | 2005-08-23 | 2007-03-08 | Huhtamaki Ronsberg, Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg | Tubular bag with tear-open tubular bag body |
US8308363B2 (en) | 2006-05-23 | 2012-11-13 | Kraft Foods Global Brands Llc | Package integrity indicator for container closure |
DE102007003550A1 (en) * | 2007-01-24 | 2008-07-31 | Huhtamaki Ronsberg, Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg | Method for producing a tubular bag having a stand base integrally formed therewith, and corresponding tubular bag |
WO2008092477A1 (en) * | 2007-02-01 | 2008-08-07 | Huhtamaki Ronsberg, Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg | Tubular bag with tearable tubular bag body |
US8408792B2 (en) | 2007-03-30 | 2013-04-02 | Kraft Foods Global Brands Llc | Package integrity indicating closure |
US20100018974A1 (en) | 2008-07-24 | 2010-01-28 | Deborah Lyzenga | Package integrity indicating closure |
US20100055429A1 (en) * | 2008-08-15 | 2010-03-04 | Toray Plastics (America), Inc. | Heat sealable monoaxially oriented propylene-based film with directional tear |
GB0819200D0 (en) | 2008-10-20 | 2008-11-26 | Cadbury Holdings Ltd | Packaging |
AT506263B1 (en) * | 2009-04-09 | 2010-02-15 | Rampitsch Klaus | DRINKING BAG, ESPECIALLY FOR THE RUNNING SPORT |
DE102009041341A1 (en) | 2009-05-19 | 2010-11-25 | Huhtamaki Forchheim Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg | Easy-to-open packaging |
DE102009031391A1 (en) | 2009-07-01 | 2011-01-05 | Huhtamaki Ronsberg, Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg | Tearable-free standing flat-ended bag for accommodating e.g. chips, has front and rear sides exhibiting position, where tear-preferred direction of position, direction of tear extension and tear-parallel line comprise specific degree |
DE102009041251A1 (en) | 2009-09-11 | 2011-03-24 | Huhtamaki Ronsberg, Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg | peel pouch |
DK2347971T3 (en) | 2010-01-26 | 2012-09-17 | Gen Biscuit | Re-sealable food packaging and manufacturing processes |
ES2390568T3 (en) | 2010-03-23 | 2012-11-14 | Generale Biscuit | Closing container for food products and manufacturing method |
RU2561894C2 (en) * | 2010-05-18 | 2015-09-10 | Интерконтинентал Грейт Брэндс ЛЛС | Easy-open and re-sealed flexible film packages and methods of manufacturing |
US9708104B2 (en) | 2010-05-18 | 2017-07-18 | Intercontinental Great Brands Llc | Reclosable flexible packaging and methods for manufacturing same |
US9656783B2 (en) | 2010-05-18 | 2017-05-23 | Intercontinental Great Brands Llc | Reclosable flexible packaging and methods for manufacturing same |
WO2012016248A2 (en) | 2010-07-29 | 2012-02-02 | Toray Plastics (America), Inc. | High barrier heat sealable film with linear tear properties |
US9669591B2 (en) | 2010-07-29 | 2017-06-06 | Toray Plastics (America), Inc. | Heat sealable film with linear tear properties |
MX337966B (en) | 2010-07-29 | 2016-03-29 | Toray Plastics America Inc | Heat sealable film with linear tear properties. |
DE102011001323A1 (en) * | 2010-10-29 | 2012-05-03 | Huhtamaki Ronsberg, Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg | Packaging and laminate for the production of packaging |
PL2686251T3 (en) | 2011-03-17 | 2015-10-30 | Intercontinental Great Brands Llc | Reclosable flexible film package, laminate, method and apparatus for manufacture |
BR112013028762A2 (en) * | 2011-05-08 | 2017-01-24 | Intercontinental Great Brands Llc | resealable flexible film packaging and manufacturing methods |
LT3119603T (en) * | 2014-03-21 | 2022-05-25 | Loparex Germany Gmbh & Co. Kg | Packaging film |
DE102014008957A1 (en) * | 2014-06-23 | 2015-12-24 | Tesseraux Spezialverpackungen Gmbh | Round bottom bag, method for producing a round bottom packaging and hotmelt adhesive package |
JP6907126B2 (en) | 2015-05-29 | 2021-07-21 | ダウ グローバル テクノロジーズ エルエルシー | Coated film and the package formed from it |
US9993426B2 (en) | 2015-09-15 | 2018-06-12 | C. B. Fleet Company, Inc. | Bisacodyl compositions and delivery apparatus |
WO2017146698A1 (en) | 2016-02-24 | 2017-08-31 | Bemis Company, Inc. | Multilayer pouch with heat-shrinkable layer |
AT519866B1 (en) * | 2017-05-05 | 2018-11-15 | Constantia Hueck Folien Gmbh & Co Kg | Recyclable, easy-to-tear packaging laminate with good barrier effect and process for its production |
US11590745B2 (en) | 2017-09-29 | 2023-02-28 | Dow Global Technologies Llc | Partially coated films and packages formed from same |
CA3109533A1 (en) | 2018-08-23 | 2020-02-27 | Constantia Pirk Gmbh & Co. Kg | Recyclable, easily tearable packaging laminate having a good barrier effect, and method for production thereof |
CN116638842B (en) * | 2023-05-24 | 2023-11-24 | 佛山市彩龙镀膜包装材料有限公司 | Composite aluminized film and preparation method thereof |
Family Cites Families (48)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE639342A (en) * | 1962-11-14 | 1900-01-01 | ||
US3432986A (en) * | 1966-01-26 | 1969-03-18 | William S Schneider | Packaging machine of the form-and-fill type |
US3990626A (en) * | 1972-10-04 | 1976-11-09 | St. Regis Paper Company | Gusseted pinch bottom laminated plastic valve bag |
JPS55116557A (en) * | 1979-02-19 | 1980-09-08 | Ishigaki Trading | Pasted bag |
DE3305144A1 (en) * | 1983-02-15 | 1984-08-16 | Hoechst Ag, 6230 Frankfurt | INNER PRESSURE-RESISTANT PACKING MADE OF FLEXIBLE MATERIAL FOR FILLING MATERIAL, PREFERRED LIQUIDS, METHOD FOR THE PRODUCTION OF A FILLED PACKAGING AND USE OF THE PACKING |
JPS6164438A (en) * | 1984-09-07 | 1986-04-02 | 富士写真フイルム株式会社 | Packaging material for photograph sensitized material and manufacture thereof |
JP2518233B2 (en) * | 1986-11-22 | 1996-07-24 | 東洋紡績株式会社 | Longitudinal tearable laminated film |
DE3869388D1 (en) * | 1988-02-25 | 1992-04-23 | Henning Schick | PACKAGING UNIT. |
US4834245A (en) * | 1988-08-05 | 1989-05-30 | Kabushiki Kaisha Hosokawa Yoko | Pouch having tearing zone for taking out content packed therein |
ES2112903T3 (en) * | 1991-05-29 | 1998-04-16 | Sumitomo Bakelite Co | SELF-STABLE BAG, PROCEDURE AND DEVICE TO MANUFACTURE SUCH BAG. |
DE4331270B4 (en) * | 1992-12-01 | 2004-04-08 | Daiwa Gravure Co., Ltd., Nagoya | Liquid dispenser device and pouch for use with the device |
US5360648A (en) * | 1993-06-24 | 1994-11-01 | The Dow Chemical Company | Pouch for packaging flowable materials |
JPH07112746A (en) * | 1993-10-19 | 1995-05-02 | Idemitsu Petrochem Co Ltd | Easily openable sealed bag |
CZ116396A3 (en) * | 1993-11-01 | 1997-02-12 | Procter & Gamble | Self-closing dosing package for a liquid |
JPH07237281A (en) * | 1994-02-28 | 1995-09-12 | Toppan Printing Co Ltd | Standing pouch |
US5613779A (en) * | 1994-11-30 | 1997-03-25 | Kabushiki Kaisha Hosokawa Yoko | Pouch |
CH689799A5 (en) * | 1995-11-28 | 1999-11-30 | Alusuisse Lonza Services Ag | Packaging container made of a multilayer composite |
JP3563863B2 (en) * | 1996-02-09 | 2004-09-08 | 大日本印刷株式会社 | Cover tape |
JPH09221151A (en) * | 1996-02-14 | 1997-08-26 | Fujimori Purakemikaru Kk | Packaging bag |
US5916685A (en) * | 1996-07-09 | 1999-06-29 | Tetra Laval Holdings & Finance, Sa | Transparent high barrier multilayer structure |
US6655837B2 (en) * | 1998-05-29 | 2003-12-02 | Toyo Seikan Kaisha, Ltd. | Pouch having a branched chamber |
JP2000006993A (en) | 1998-06-26 | 2000-01-11 | Idemitsu Petrochem Co Ltd | Easily unsealable self-supporting bag |
US20040157015A1 (en) * | 1998-06-26 | 2004-08-12 | Idemitsu Petrochemical Co., Ltd. | Easily openable self-standing bag |
DE29817142U1 (en) | 1998-09-24 | 2000-03-02 | Bischof & Klein | Stand-up pouch made of weldable material |
CH692980A5 (en) * | 1999-01-21 | 2003-01-15 | Alcan Tech & Man Ag | Packaging. |
JP2001018989A (en) | 1999-07-02 | 2001-01-23 | Dainippon Printing Co Ltd | Refill pouch |
JP2001322649A (en) * | 2000-05-16 | 2001-11-20 | Okura Ind Co Ltd | Refill pouch |
JP2002059942A (en) * | 2000-08-22 | 2002-02-26 | Toyo Seikan Kaisha Ltd | Self-standing packing member |
US6446847B1 (en) * | 2001-02-16 | 2002-09-10 | Sonoco Development, Inc. | Flexible container having integrally formed resealable spout |
US20020116029A1 (en) * | 2001-02-20 | 2002-08-22 | Victor Miller | MRI-compatible pacemaker with power carrying photonic catheter and isolated pulse generating electronics providing VOO functionality |
US6702462B2 (en) * | 2001-03-26 | 2004-03-09 | Cliff Barr Inc. | Flexible dispensing package |
JP2003026192A (en) | 2001-05-10 | 2003-01-29 | Hosokawa Yoko Co Ltd | Liquid storage bag |
US6390676B1 (en) * | 2001-05-15 | 2002-05-21 | Honeywell International Inc. | Reclosable package using straight tear film and process for manufacture |
JP2002347782A (en) | 2001-05-30 | 2002-12-04 | Kotobuki Sangyo:Kk | Polyethylene bag |
JP2003054579A (en) * | 2001-08-16 | 2003-02-26 | Showa Packs Kk | Paper bag having film inner bag |
KR100778488B1 (en) | 2001-10-26 | 2007-11-21 | 가부시키가이샤 호소카와 요코 | Packaging member with easy-opening means |
US6679630B2 (en) * | 2002-04-01 | 2004-01-20 | Recot, Inc. | Self-standing package and method for making the same |
US7722254B2 (en) * | 2002-10-30 | 2010-05-25 | Pouch Pac Innovations, Llc | Flexible pouch and method of forming a flexible pouch |
US20050079251A1 (en) * | 2003-10-10 | 2005-04-14 | Bell Gary M. | Flexible pouch-bowl arrangement and methods |
DE202004016420U1 (en) | 2004-05-17 | 2005-03-24 | Huhtamaki Ronsberg, Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg | Stand-up pouch with optimized tear properties |
DE102005039852A1 (en) * | 2005-08-23 | 2007-03-08 | Huhtamaki Ronsberg, Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg | Tubular bag with tear-open tubular bag body |
JP5124085B2 (en) * | 2005-08-24 | 2013-01-23 | 押尾産業株式会社 | Self-supporting bag and its manufacturing method |
JP4816322B2 (en) * | 2006-08-16 | 2011-11-16 | 東洋製罐株式会社 | Branch type standing pouch |
US20080182052A1 (en) * | 2007-01-29 | 2008-07-31 | Cryovac, Inc. | Multilayer heat-shrinkable film of high transparency, low haze, and high semi-crystalline polyamide content |
US7744806B2 (en) * | 2007-01-29 | 2010-06-29 | Cryovac, Inc. | Process for making shrink film comprising rapidly-quenched semi-crystalline polyamide |
US10202229B2 (en) * | 2007-05-21 | 2019-02-12 | Cryovac, Inc. | Easy opening packaging article made from heat-shrinkable film exhibiting directional tear |
US10189621B2 (en) * | 2007-05-21 | 2019-01-29 | Cryovac, Inc. | Bag made from high-strength heat-shrinkable film exhibiting directional tear, and process utilizing same |
DE102009041251A1 (en) * | 2009-09-11 | 2011-03-24 | Huhtamaki Ronsberg, Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg | peel pouch |
-
2004
- 2004-06-03 DE DE202004016420U patent/DE202004016420U1/en not_active Expired - Lifetime
- 2004-06-03 DE DE102004026980A patent/DE102004026980B4/en not_active Revoked
-
2005
- 2005-05-13 WO PCT/EP2005/005290 patent/WO2005113370A1/en active Application Filing
- 2005-05-13 DE DE202005021704U patent/DE202005021704U1/en not_active Expired - Lifetime
- 2005-05-13 MX MXPA06013265A patent/MXPA06013265A/en not_active Application Discontinuation
- 2005-05-13 CA CA002565916A patent/CA2565916A1/en not_active Abandoned
- 2005-05-13 US US11/596,776 patent/US20080101733A1/en not_active Abandoned
- 2005-05-13 NZ NZ551038A patent/NZ551038A/en not_active IP Right Cessation
- 2005-05-13 CN CN2010102369417A patent/CN101891034A/en active Pending
- 2005-05-13 RU RU2006144816/13A patent/RU2376227C2/en not_active IP Right Cessation
- 2005-05-13 BR BRPI0511155-2A patent/BRPI0511155A/en not_active Application Discontinuation
- 2005-05-13 EP EP05744962A patent/EP1751025A1/en not_active Ceased
- 2005-05-13 JP JP2007517058A patent/JP2007537938A/en active Pending
-
2011
- 2011-09-20 US US13/237,539 patent/US20120010060A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
US20080101733A1 (en) | 2008-05-01 |
JP2007537938A (en) | 2007-12-27 |
EP1751025A1 (en) | 2007-02-14 |
WO2005113370A1 (en) | 2005-12-01 |
RU2006144816A (en) | 2008-06-27 |
CN101891034A (en) | 2010-11-24 |
DE202004016420U1 (en) | 2005-03-24 |
DE102004026980A1 (en) | 2005-12-08 |
BRPI0511155A (en) | 2007-12-04 |
NZ551038A (en) | 2009-10-30 |
DE202005021704U1 (en) | 2009-10-15 |
US20120010060A1 (en) | 2012-01-12 |
DE102004026980B4 (en) | 2007-01-18 |
RU2376227C2 (en) | 2009-12-20 |
MXPA06013265A (en) | 2007-04-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FZDE | Discontinued |